


\documentclass{letter}


\signature{Your name}
\address{Street \\ City \\ Country}
\begin{document}

\begin{letter}{Company name \\ Street\\ City\\ Country}
\opening{Dear Sir or Madam:}

\dots

\closing{Yours Faithfully,}
\ps{P.S. Here goes your ps.}
\encl{Enclosures.}

\end{letter}

\end{document}

